71902 ACE/HCPA9ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71902 ACE/HCPA9ADGA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This ceramic ball bearing features a universal matchable (SU) design, allowing two bearings to be paired in a back-to-back or face-to-face arrangement to accommodate combined loads. Its construction with phenolic cage and extra light preload (Class A) enables superior high-speed performance up to 95,000 rpm, making it ideal for applications where high rigidity and minimal friction are critical.
71902 ACE/HCPA9ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Basic bearing designation (15mm bore, 28mm OD, 14mm width) |
| ACE | Enhanced design with 25° contact angle and optimized internal geometry |
| HC | Hybrid Ceramic construction (steel rings with ceramic balls) |
| PA9A | High precision tolerance class (PA9A) with extra light preload (A) |
| DGA | Universal matchable bearing set designation |
Structural Features and Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear, enabling higher operating speeds and extended service life. The ceramic balls also provide electrical insulation and superior performance in high-temperature environments.
High-Speed Phenolic Cage: The phenolic cage material offers excellent dimensional stability and low friction at high rotational speeds, contributing to the bearing's exceptional limiting speed capability of 95,000 rpm.
Precision Engineering: Manufactured to PA9A tolerance class with extra light preload, this bearing delivers minimal runout and vibration, ensuring smooth operation and precise positioning in high-accuracy applications.
Universal Matching Capability: The SU designation allows for flexible bearing arrangements, enabling optimal performance under combined radial and axial loads from any direction.
71902 ACE/HCPA9ADGA Bearing Typical Application Areas
- High-speed machine tool spindles and precision machining centers
- Dental and medical handpieces requiring high RPM operation
- Aerospace components and instrumentation systems
- Semiconductor manufacturing equipment and robotics
- High-performance motors and precision gearboxes
